Gold-washing screen.



PATENTED APR. '7, 1908.

W H. ROUGHSEDGE. GOLD WASHING SCREEN. APPLICATION FILED FEB. 11, 1907.

3 SHEETS-SHEET 1.

r I I" W I U v No. 883,974. PATENTED APR. 7, 1908.

I W. H. ROUGHSEDGB.

GOLD WASHING SCREEN.

APPLICATION FILED FEB.11, 1907. 3 SHEETS-SHEET 2.

- PATENTED APR. 7, 1908. W. H. ROUGHSEDGE.

GOLD WASHING SCREEN,

APPLICATION FILED FEB. 11, 1907.

3 SHEETSS'HEET 3.

men/tom 41 G, W

Unirnn STATES PATENT onnioa.

WILLIAM H. seriousness, or OTTAWA, ONTARIO, CANADA.

eoLn-wiisnme scannn.

No. 883,974. Specification of Letters Patent.

Application filed February 11, 1907. Serial No. 356,815.

To all whom it may concern:

Be it known that I, WILLIAM H. ltoUGHs- EDGE, residing at Ottawa, in the county of Carleton, Province of Ontario, and Dominion of Canada, have invented new and useful 1 Improvements in Gold-Washing Screens, of WhlCll the following is a specification.

My invention which will he hereinafter fully set forth and claimed relates to devices for se aratin stones, ores, gravel, sand and the line one rom the other or into different sizes. i

The object of my invention is a screen having a greater screening area than screens of the same size but other construction; to reduce the cost of construction; to reduce the wear of the screening surface; to increase the efiiciency of the separation; to reduce the liability to clogging, to operate more elliciently upon the material in breaking it up; and to increase the facility for repair.

Figure 1 is a side elevation of my improved screen, parts being broken out and show 1 in section. Fig. 2 is part transverse section, on line 22, Fig. 1, and part elevation of the feed end, on a larger scale. Fig. 3 is an end view of the discharge and driving end. Fig. 4 1s a representation of part of a tall ring,

showing a modification of thc'method of holding the rods, and Fig- 5 is a section of the same, on line 55 Fig. 4.

My improved screen consists essen tially of two concentric screening surfaces, an outer cylinder, A, of perforated sheet metal or" other perforated or meshed material and an inner cylinder of considerably smaller diameter, formed of longitudinal rods, bars or pipes, B B B. The screen being, as is usual, placed in an inclined position, one end l ma he s oken of as the head, upper or feerii eri'r and t e other as the ta l, lower, discharge or drive end; the illustration showing an exam lc of some twenty feet in lcngth,-it being undhrstood that this dimension may vary according to the particular requirements of each case.

C is what is technically known as the head ring,and D the tail ring, both being formed with seats 2 for longitudinal beams, consisting of sectional or angle bars, l), which latter connect the two firmly. The head ring has a shoulder, c, for carrying the screening cylinder, A, is provided with an inner flange 0, in which the bars B B B are secured and is formed w h a central opening, 2, for the inl l troduction of the feed'chute, It is also provided with a tread ring, 0 referabl oolted to itand having a tire, shrun upon it which rests upon a rolls, G. The latter have ax es, g, which are suitably journaled upon a proper frame or support, such as G and G these rolls forming the su port of the head end of the screen. The tai ring D is provided with a trunnion d Fig. 1 journaled in a thrust beari H, suitably supported, and also with a ievel web may also he .used. j used and for certain purposes piping is preferable; they will be referred to as longitudinal -scrccn bars. 'lhcse maybe placed any distance apart, as the rer uircments" of eac case may demand. 'lhese longitudinal screen bars 15 B B" are secured in holes drilled in the flange 0 of thehcad ring and, the screen being a long one, they may pass through an intermediate sup orting rlpg, K, a tail ring, K, and some 0 them throu h a termidistance from the tail ring I), and K, being the termination-or tail of the inner screen proper, some distance from that. Every lourth longitudinal screen bar, B ably ol" extra'strcngtlnif full length from C to K and is fitted tight, while the remainder terminate in the supporting ring K and each one, B, adjacent to the fixed one, B, is litted loosely, ca able of from the'inner screen and the space between i Patented April 7, 1908.

pair of carrying some distance from the head ring, as

nal tail ring, K the latter being p aced some turning and hnvingin the supports and K lateral play by being placed in oblong openwheel, I), into which gears a pinion I on a For the inncn-s'creen, bars or rods may be preferpiping, cxtends'thc K and the tail piece D the discharge for the coarsest debris.

The supporting rings K K consist each of two tire-like hoo s B and B one inside and 5 one outside of t e longitudinal screen bars B B B The longitudin :l'screen bars are separated by radial separator rods orbolts, b, referably tubing, secured in the rings B anil B; An outer ring or hoop B is secured 10 to the angle bars E by straps or cleats, e, and connected to the double ring B B by stag bolts, 13, Fig. 2.

modification is shown in Figs. 4 and 5,

showing the screen bars B B B passin 15 through a plate ring B" and having ova holes, 3 for the loose rods B The supporting ring K is a flat late ring drilled to receive the fixed rods An angle iron rin 7c is secured to this at the outer edge which extends to thean le bars E to which i it is secured by suitable c eats onstraps, c.

It will be observed that the coarse and heavy material is first fed into the inner screen which is of considerable strength, re- 5 tains the coarse and heavy parts and prevents them coming into contact with the outer finer screen which is of much lighter construction; damage and expensive wear and tear of the latter is thereby prevented. 3 ,The manner of securing the screen bars of the inner screen is of importance. Every alternate one is loose and free to turn and also to move laterally at the tail end. By turning, new wearin -,surface is Ipresented 5 and the wear is there ore even am by moving laterall as the screen rotates, stones and clods that ave become jammed are set free.

The double screening surface facilitates the action of each and each becomes more ei'li- 40 cient.

I claim as my invention 1. In a screen, the combination with a head ring and a tail ring each having seats for longitudinal beams, longitudinal beams hav- 5 ing their ends secured in said seats and connecting the said rings, a shoulder ,on said head ring to receive the end of the outer screening cylinder, a disk flange on said head ring to receive the ends of longitudinal screen 5 bars forming the inner screening cylinder, a tread ring secured to said head r1ng,'carryin rolls u on which the tread ring is sup crte journa supports of said rolls, a beve wheel on said ta ring with trunnion, a journal bearing for said trunnion suitably supported, a

cross shaft suitably 'ournaled, means for giving motion to said s aft, a bevel pinion on said shaft,gearing into said bevel wheel, a plate ring secured to the longitudinal beams so some distance from the tail ring and having secured in it the ends of some of the longitudinal screen bars forming the inner screen, a pair of tire-rings placed some distance from said plate ring and between which the ends 5 of the shorter longitudinal screen bars are of an inner screening cylinder coin osed oi seems placed, an outer tirering in the same plane as the other two tire rings secured to the longitudinal beams and supporting the outer screening cylinder and stay bolts passing from the said outer ring to the inner ring, substantially as set forth.

2. In a screen, the combination with a head ring, means of su porting the same rotatively, a disk flange f drming part of said ring and having holes disposed in a circie, a 5 tail ring with trunnion, a journal for said trunnion suitablysupported, means for givin a rotary motion to said tail ring, longitudina beams secured to and connecting said head ring and tail ring rigidly, a plate ring be- 30 tween said head and tail ring secured to said longitudinal beams and drilled with hoies in a circle, a tire ring between the last named ring and the. head ring and secured to the longitudinal connecting bars, a cylinder 35 screen supported upon said tire ring at one end upon the head ring at the other, a pair of tire rings of smaller diameter in the same plane as the tire ring referred to and a series of longitudinal screen bars secured at one end in the flange of the head ring, some of them held between said two tire rings and some of them secured firmly in the plate ring hereinbeiore referred to and stay belts or rods passing from the outer tire rings to the two inner tire rings, substantially as set forth.

3. In a screen of the character described, the combination of three concentric rings, a series of radial stay bolts passing through and connecting the three rings, the differenhe between the outer diameter of the inner ring and the inner diameter oi the middle ring being a little more than the diameter of the screen bars which are to be placed be-- tween them, a series of radiai separator rods or bolts secured in the two inner rings and forming with the bolts alternately iarger and smaller divisions for said screenhars, and a series of screen bars in, the spaces formed by the inner ringsand ra'dial boits and rods, substantially as set forth.

'4. In a screen otthe character described, the eonahination with an outer screening cylinderkfi perforated or meshed material,

longitudinal screen bars some of w ich are fixed and extend from head to tail, while intermediate ones are fixed and shorter and others of the same length as the latterand alternating w1th the fixed ones are free to rotate and having their tail ends free to move laterally, and means for supporting said vlinder, substantially as forth.

5. in a screen of the character described the combination with a head ring and a tail ring, of a series of longitudinal screen bars cylindrically disposed and held longitudi nally in'imovnhle in the head ring and some held fixed at both ends but intermediate ones free to rotate and move laterally, means for rigidly and others free to revolve and move laterally, means of supporting said rings and means of giving a rotary motion to the same, substantially as set forth. v

In testimony whereof I affix my signature, in presence of two subscribing Witnesses.

W. H. ROUGHSEDGE.

supporting said rings and means for givin a rotary motion to said cylinder, substantially as set forth.

6; In a screen of the character described, the combination with a head ring and a tail ring, longitudinal beams connecting said rings, a perforated or meshed screening cylinder carried upon said rings and extendin from the head only'partly towards the ta' ring, an inner cylinder composed of 1ongitudinal sereenbars held in said rings some Witnesses:

CHARLES M. FARLEY, E. M. Roo'ensnnen 

